9
Frequency Agile UHF Belt-Pack Transmitter
Rio Rancho, NM – USA
OPERATING NOTES
The AUDIO LEVEL control knob should not be used to control the volume of your sound system or recorder levels.
This gain adjustment matches the transmitter gain with the user’s voice level and microphone positioning.
If the audio level is too high — both LEDs will be Red frequently or stay Red. This condition may reduce the dynamic
range of the audio signal.
If the audio level is too low — neither LED will light, or only one LED will flicker Green. This condition will reduce the
signal to noise ratio of the system.
The input limiter will handle peaks up to 30dB above full modulation. Occasional limiting is desirable, indicating that
the gain is correctly set and the transmitter is fully modulated for optimum signal to noise ratio.
Different voices will usually require different settings of the AUDIO LEVEL control, so check this adjustment as each
new person uses the system. If several different people will be using the transmitter and there is not time to make
the adjustment for each individual, adjust it for the loudest voice.
ADJUSTING THE TRANSMITTER FREQUENCY
If you are experiencing interference from another signal on your frequency, you may want to change the operating
frequency of your system. The left switch changes the operating frequency by 1.6 MHz per step and the right switch
changes it 100 kHz per step. If you are experiencing interference, change the operating frequency in 100 kHz steps
to find a clear channel. If it is not possible to find a clear channel using the 100 kHz switch, return it to its original
position and change the 1.6 MHz switch by one click then try the 100 kHz switch again.
To gain access to these switches, slide the access door sideways with a fingerrnail.
The UDR700 receiver front panel will indicate the correct switch settings to match the receiver frequency.
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0 1
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